CNRFC - Hydrology - Observed River/Reservoir Conditions

TRINITY RIVER - HOOPA (HOOC1)

Latitude: 41.05º N	Longitude: 123.68º W	Elevation: 333 Feet
Location: Humboldt County in California		River Group: North Coast

Monitor Stage: 44.0 Feet

Flood Stage: 48.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	58,300	30.79	Feb 04, 2025
2024*	46,500	28.44	Jan 14, 2024
2023*	66,500	32.28	Mar 15, 2023
2022*	16,600	20.91	Jan 8, 2022
2021*	13,300	19.67	Feb 16, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	40.30	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1958	125,000	29.15	Feb 19, 1958
1940	124,000	31.20	Feb 28, 1940
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ105)

Tonight: Rain likely in the evening, then chance of rain overnight. Slight chance of drizzle overnight. Lows 41 to 51. South wind around 20 mph in the evening.

Friday: Mostly cloudy. Slight chance of drizzle. Chance of rain. Breezy. Highs 47 to 62. Southeast wind around 20 mph in the valleys and southeast 20 to 30 mph at higher elevation.

Friday Night: Rain, breezy. Lows 39 to 49. South wind around 20 mph in the valleys and south 20 to 30 mph at higher elevation.

Saturday: Windy, rain. Highs 45 to 58. South wind 20 to 30 mph with gusts at higher elevations to around 50 mph.

Saturday Night: Windy. Rain showers and isolated thunderstorms. Snow level 5000 to 5500 feet. Lows 37 to 47. South wind 20 to 30 mph with gusts at higher elevations to around 50 mph.

Sunday: Rain. Snow level 4500 feet. Highs 41 to 54.

Sunday Night: Rain and snow. Lows 34 to 44.

Monday: Rain and snow. Highs 39 to 54.

Monday Night: Mostly cloudy. Slight chance of drizzle. Chance of rain and snow. Lows 32 to 42.

Tuesday: Mostly cloudy. Chance of drizzle. Slight chance of snow. Highs 42 to 56.

Tuesday Night: Mostly cloudy. Chance of drizzle. Chance of rain and snow. Lows 33 to 43.

Wednesday and Wednesday Night: Rain and snow likely. Highs 39 to 53. Lows 32 to 42.

Thursday: Mostly cloudy. Chance of rain and snow. Highs 37 to 52.

Flood Impacts
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river is expected. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be innundated.
55.0 Feet	Extensive and severe flooding between Willow Creek and Weitchpec, and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
53.0 Feet	Extensive flooding of all low lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas is likely.
51.0 Feet	Extensive flooding of all low lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
48.0 Feet	Considerable flooding of low lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
46.0 Feet	Flooding of many low lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
44.0 Feet	Minor flooding of the lowest lying areas may occur.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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